They depict two intervals from when Jupiter first appears along the
horizon, calculating the planet’s position at 60 and 120 days.

Previously, it was thought that Babylonian astronomers operated
exclusively with arithmetical concepts, but the texts contain
geometrical calculations based on a trapezoid’s area and its “long” and
“short” sides, writes Mathieu Ossendrijver.

Ossendrijver, professor of history of ancient science at the
Humboldt-Universität zu Berlin, says the ancient astronomers also
computed the time when Jupiter covers half of the 60-day distance by
partitioning the trapezoid into two smaller ones of equal area.

European scholars in Oxford and Paris were previously credited with
developing such calculation in the 14th century, but Ossendrijver
suggests they were far behind their ancient Babylonian counterparts.
“These computations predate the use of similar techniques by medieval European scholars by at least 14 centuries,” he writes.